add robots.txt #695

	# name: 'Chromatic'

	# on:
	# pull_request:
	# branches: [develop]

	# jobs:
	# test:
	# runs-on: ubuntu-latest
	# steps:
	# - uses: actions/checkout@v1
	# - run: yarn
	# - uses: chromaui/action@v1
	# with:
	# projectToken: ${{ secrets.CHROMATIC_PROJECT_TOKEN }}
	# token: ${{ secrets.GITHUB_TOKEN }}

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